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We're seeing unusual behavior on the Zebra portion of quagga 1.1.0 with
respect to open file descriptors. It appears to open one for
/usr/local/etc/quagga/zebra.conf immediately. After we interact with the
Telnet terminal and issue a 'write memory', it appears that it abandons
the descriptor, but holds it open. See below.

$ uname -rv
9.3-RELEASE-p43 FreeBSD 9.3-RELEASE-p43 #0: Sat May 28 00:19:32 UTC
2016 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
$ lsof | grep quagga
zebra 1896 quagga cwd VDIR
243,500564018 26 4 /
zebra 1896 quagga rtd VDIR
243,500564018 26 4 /
zebra 1896 quagga txt VREG 243,500564018
285624 429178 /usr/local/sbin/zebra
zebra 1896 quagga txt VREG 243,500564018
108664 270553 /libexec/ld-elf.so.1
zebra 1896 quagga txt VREG 243,500564018
422288 429135 /usr/local/lib/libzebra.so.0.0.0
zebra 1896 quagga txt VREG 243,500564018
58968 525319 /lib/libcrypt.so.5
zebra 1896 quagga txt VREG 243,500564018
22512 270641 /usr/lib/librt.so.1
zebra 1896 quagga txt VREG 243,500564018
1406408 215020 /lib/libc.so.7
zebra 1896 quagga txt VREG 243,500564018
104472 270580 /lib/libthr.so.3
zebra 1896 quagga 0u VCHR 0,11
0t0 11 /dev/null
zebra 1896 quagga 1u VCHR 0,11
0t0 11 /dev/null
zebra 1896 quagga 2u VCHR 0,11
0t0 11 /dev/null
zebra 1896 quagga 3u unix 0xfffffe00a41872a8
0t0 ->0xfffffe0004828550
zebra 1896 quagga 4u IPv6 0xfffffe00045c5dc8
0t0 ICMPV6 *:*
zebra 1896 quagga 5u rte 0xfffffe0004817a40
0t0
zebra 1896 quagga 6uW VREG
55,4225368260 5 102405 /var/run/quagga/zebra.pid
zebra 1896 quagga 7u VCHR 0,103
0t245264 103 /dev/pts/0
zebra 1896 quagga 8u unix 0xfffffe0004b3daa0
0t0 /var/run/quagga/zserv.api
zebra 1896 quagga 9u IPv6 0xfffffe01344ff3d0
0t0 TCP *:zebra (LISTEN)
zebra 1896 quagga 10u IPv4 0xfffffe013453c3d0
0t0 TCP *:zebra (LISTEN)
zebra 1896 quagga 11u unix 0xfffffe0004a2c000
0t0 /var/run/quagga/zebra.vty
zebra 1896 quagga 12u unix 0xfffffe00044a7550
0t0 /var/run/quagga/zserv.api
zebra 1896 quagga 14u VREG 243,500564018
162131 429250 / (zroot)
zebra 1896 quagga 15u VREG 243,500564018
162163 429253 / (zroot)
zebra 1896 quagga 16u VREG 243,500564018
162034 429254 / (zroot)
zebra 1896 quagga 17u VREG 243,500564018
162067 429255 / (zroot)
zebra 1896 quagga 18u VREG 243,500564018
162099 429258 / (zroot)
zebra 1896 quagga 19u VREG 243,500564018
162007 429259 / (zroot)
zebra 1896 quagga 20u VREG 243,500564018
162040 429260 / (zroot)
zebra 1896 quagga 21u VREG 243,500564018
162232 429261 / (zroot)
zebra 1896 quagga 22u VREG 243,500564018
162265 429262 / (zroot)
zebra 1896 quagga 23u VREG 243,500564018
162299 429263 / (zroot)
zebra 1896 quagga 24u VREG 243,500564018
162363 429264 / (zroot)
zebra 1896 quagga 25u VREG 243,500564018
162461 429265 / (zroot)
zebra 1896 quagga 26u VREG 243,500564018
162589 429266 / (zroot)
zebra 1896 quagga 27u VREG 243,500564018
162622 429267 / (zroot)
zebra 1896 quagga 28u VREG 243,500564018
162039 429269 / (zroot)
zebra 1896 quagga 29u VREG 243,500564018
162071 429272 / (zroot)
zebra 1896 quagga 30u VREG 243,500564018
162104 429273 / (zroot)
zebra 1896 quagga 31u VREG 243,500564018
162037 429274 / (zroot)
zebra 1896 quagga 32u VREG 243,500564018
162004 429277 / (zroot)
zebra 1896 quagga 33u VREG 243,500564018
162037 429278 / (zroot)
zebra 1896 quagga 34u VREG 243,500564018
162071 429279 / (zroot)
zebra 1896 quagga 35u VREG 243,500564018
162102 429280 / (zroot)
zebra 1896 quagga 36u VREG 243,500564018
162198 429281 / (zroot)
zebra 1896 quagga 37u VREG 243,500564018
162232 429286 / (zroot)
zebra 1896 quagga 38u VREG 243,500564018
162391 429287 / (zroot)
zebra 1896 quagga 39u VREG 243,500564018
162458 429288 / (zroot)
zebra 1896 quagga 40u VREG 243,500564018
162491 429289 / (zroot)
zebra 1896 quagga 41u VREG 243,500564018
162655 429290 / (zroot)
zebra 1896 quagga 42u VREG 243,500564018
162686 429291 / (zroot)
zebra 1896 quagga 43u VREG 243,500564018
161982 429292 / (zroot)
zebra 1896 quagga 44u VREG 243,500564018
162014 429293 / (zroot)
zebra 1896 quagga 45u VREG 243,500564018
162047 429308 / (zroot)
zebra 1896 quagga 46u VREG 243,500564018
162079 429309 / (zroot)
zebra 1896 quagga 47u VREG 243,500564018
162016 429312 / (zroot)
zebra 1896 quagga 48u VREG 243,500564018
162081 429313 / (zroot)
zebra 1896 quagga 49u VREG 243,500564018
162207 429314 / (zroot)
zebra 1896 quagga 50u VREG 243,500564018
162302 429315 / (zroot)
zebra 1896 quagga 51u VREG 243,500564018
162399 429316 / (zroot)
zebra 1896 quagga 52u VREG 243,500564018
162462 429317 / (zroot)
zebra 1896 quagga 53u VREG 243,500564018
162495 429319 / (zroot)
zebra 1896 quagga 54u VREG 243,500564018
162593 429324 / (zroot)
zebra 1896 quagga 55u VREG 243,500564018
162626 429325 / (zroot)
zebra 1896 quagga 56u VREG 243,500564018
162691 429326 /usr/local/etc/quagga/zebra.conf
bgpd 1905 quagga txt VREG 243,500564018
422288 429135 /usr/local/lib/libzebra.so.0.0.0